Receiver.



J. s. GOLDBERG-2 RECEIVER. APPLICATION FILED NOV. 23, 1903.

Patented Oct. 20, 1908.

I .Invenl'uf Juhn iGnldtgel q- L A army umTED srArrg PATENT v OFFICE.

rein: eotnnnse, or onioAGo, ILLINOIS, ASSIGNOR o THE STROMBERG-GARLSON TELE- Pllsllii ll MANUFACTURING NEW] YORK. I v

No. emyroe.

COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF nncnrvnn.

Patented Oct. 20, 1908.

Application filed November 23, 1903. Serial No. 182,351.

To all'eola om it may concern."

it lrnownthat I, Jon-N S. GOLDBERG, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, haveinventedla certain new and useful Improvement-in Receivers, of which the following is a. full, clear, concise, and exact description, reference being had to the accomanvin drawin s formin a, art of this e 2 V b specification.

My invention relates toreceivers, particulady (to; such known as watchcase receivers, object theprovision ofa resevera i lifiedj construction therefor, and in hich t e weight isfreduced to a trinim Without, "airing the efficiency.

1. Generally spea ing, my improved receiver consists of anouter casing in the shape of a ring composed preferably of magnet steel. '1 his ring lie oppositely polarized at diametrically oppositeflregions and from these regions magnet cores extend and are provided with coils which-maybe connected in circuit in the usual manner. .Heretofore this outer casing was romposedofznon-ma netic material which necessitated the ad ition of a magnet upon the interior thereof, which magnet usually was semi-circular in form, the pole piece extending from the ends thereof. This magnet usuallyembodied the greater portion of the receiver W61 ht, and by my improved construction t 's superfluous weight is entirely. gl'minated as it is unnecessary to use such a ditional ma net for the reason above explained. A diap ragm rests on the front edge of the case and in order to 'g vrevent short circuiting of the magnetic cirsuit, the nragm is preferably composed a aluminum r othernon-magnetic material 1 provided with disk of magnetic material at its center to be disposed over the pole faces.

lhe rear opening the ring casing is covered by a disk of insulating material upon the inside of which may be mounted the terminal ,15; tips and, noon the outside of which may be mounted the terminal osts, and also when desired an operators ead frame may be mounted thereon.

The figures in the accompanying drawing wi l more clearly illustrate my invention, Figure 1 being front View of the receiver with the diaphragm and cap removed, Fi 2 being a vertical, longitudinal section ta en on lines 2, 2, Fig. l, and Fig. 3 being a rear 55 view thereof.

' A casing 1 in the shape. of a rin is pro-- tvided at its rear with an annular we 2, and E at its front upon the outside thereof with l threads adapted to receive the-receiver cap i 3. The casing 1 is prefer-ably composed of l magnetic material such as magnet steel and l by being suitably interposed in a magnetic E field, may be magnetized so that diametric4 all opposite regions-thereon are oppositely po arized. At these polarized reg1ons,pole' pieces 5, 5 are secured by-means of screws 6, 6 passing through them andthreading into the web 2. These pole pieces are provided with flaring portions"7, 7 whereby greater contact area is assured between the ,pole pieces and the polarized part of the casing. Theinner ends of the polepieces terminate inrc'ore pieces 8, -8 extending perpendiculart thereto and u on which are mounted coils 9, 9.- These eoilhare first wound upon paper spools 10, 10, whereafter said spools are s ipped over the core ieces and held between'flanges 11, 11.. n order to hold the spools and flanges in placethe-ends of the core; i'ece are'then upset as indicatedlin Fig. 2'. his results in securely holding such spools in place and also in presenting a larger pole face area-to act upon the magnetic portion of. the diaphragm. In order to prevent short-circuiting of the lines of force which should ass between the pole pieces; l provide a iaphragm 12 of nonmagnetic material, which may be preferably aluminum, and at the center of said disk I mount a disk 13 of magnetic material preferably soft iron, which disk may be secured to the diaphragm by rivets 14, 14. The disk 13 will now lie-in the path of the lines of force passing between the, pole pieces, the diaphragm 12 being of non-magnetic material preventing direct passage of magnetic lines of force from one polarized area to the other. A plate 15 of insulating material covers the-back of the easing and is held in place referably by screws 16, 16 passing through t e pole pieces 5 and through said plate to be engaged on the other side thereof by nuts 16, 16. "llelpninal ti s 17, 17 are mounted upon the inner side 0 said plate 15, the coil terminals leading to said tips. These tips are held under screws 18, 18 which pass to the outside of the plate to be engaged by nuts 18', 18 and by terminal buttons 19, 19, in the usual manner. I I have shown an operators head frame in connection with the receiver, the headband 21 being covered with leather 22 and secured -to a supporting piece23 provided at its end with a bearing 24, engaging a shaft '25 extending between lugs 26, 26, which lugsform part of a plate 27 which is secured to the in sulating plate 15. The plate 27 is referably provided with the holes 28, 28 a apted to receive the extending ends of the screws 16, 16. I have shown a thumb nut 29 engaging one of said screws over said plate by means of which the plate ma be firmly held against the'back of the insu ating plate 15.

The receiver thus at all times lies in a correct and easy position against the operators ear.

I have thus described'a receiver which is of a most simple construction and employing a minimum number of parts and r I claim as new'and desire to secure by Letters Patent.

1. In a receiver, the combination of an outer cylindrical casing consisting of a continuous one-piece shell of magnetlc material of which diametrically opposite regions are oppositely polarized, bent pole pieces extending from such polarized regions, coils displace between the bent ends and the upset ends thereof and a disk of magnetic material disposed before the pole faces of saidfpole receiver coils disposed upon sai pieces, said disk being supported from a dia phraglm of non-magneticmaterial.

3. n a receiver, the combination with an outer one piece casing in the shape of a continuous ring and composed of magnetic material, diametrically o posite regions of said casing being opposite y dpolarized, bent ole ieces extending inwar y from said, p0 ar- 1zed regions, cores extending perpendicularly from the inner ends of sa1d(pole pieces, cores and held in place between the bent ends and the upset ends thereof and adiaphragm disposed before the faces of said cores.

4. In a receiver, the combination with an outer one piece casing in the shape of a continuous ring and composed of magnetic material, of an annular web extending inwardly from the rear edgeof said casing, two diametrically opposed re one of said casing being OPPOSltGlYPOlflIlZG ,a bent pole piece secured to such web at each of said areas and extending inwardly, integral cores extending forwardly and perpendicularly from said pole pieces at the inner ends thereof, .receiver coils disposed about said cores and held in place .by the upset ends thereof and-by the ody portions of the pole dpieces, a disk of magnetic material dis ose before the pole faces of said cores an a diaphragm of nonmagnetic material for su porting said disk. In witness whereof, I iereunto subscribe my name this 18th day of November A. D.

JOHN S. GOLDBERG.

WVitnesses:

CHARLES J. SCHMIDT, LEONARD W. NOVANDER. 

